package org.apache.maven.model.interpolation;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import org.apache.maven.model.Model;
import org.apache.maven.model.building.ModelBuildingRequest;
import org.apache.maven.model.building.ModelProblemCollector;

import java.io.File;

/**
 * Replaces expressions of the form <tt>${token}</tt> with their effective values. Effective values
 * are basically calculated from the elements of the model itself and the execution properties from
 * the building request.
 *
 * @author jdcasey
 *         <p/>
 *         Created on Feb 2, 2005
 */
public interface ModelInterpolator {

  /**
   * Interpolates expressions in the specified model. Note that implementations are free to either
   * interpolate the provided model directly or to create a clone of the model and interpolate the
   * clone. Callers should always use the returned model and must not rely on the input model being
   * updated.
   *
   * @param model The model to interpolate, must not be {@code null}.
   * @param projectDir The project directory, may be {@code null} if the model does not belong to a
   *        local project but to some artifact's metadata.
   * @param request The model building request that holds further settings, must not be
   *        {@code null}.
   * @param problems The container used to collect problems that were encountered, must not be
   *        {@code null}.
   * @return The interpolated model, never {@code null}.
   */
  Model interpolateModel(Model model, File projectDir, ModelBuildingRequest request, ModelProblemCollector problems);

}
